Windows 10: Why is my laptop showing a blank screen on 144hz and 72hz but not on 60hz?

I have a asus tuf dash f15 laptop, it has a i5 11300H and a rtx3060 graphics card, it was working fine untill 2 months ago when a quarter of my display started showing a blank screen and the other part of my screen works fine and now it only works when I put the refresh rate on 60hz. When it was working fine on 144hz or 72hz before 2 months. Is there any possible way to fix this

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Laptop with 144Hz screen locked to 60Hz for no reason

I have this issue that my games get stuck at 60 fps (the screen is 144Hz) and I have figured that this is not something related to the game itself, you know when you start to get used to see like 90
to 144 frames per second, you can distinguish between 144 fps and 60 fps. The thing is that when this happens and my game gets locked to 60 fps, when I return to desktop and I start to move the mouse pointer I can appreciate that its movement is kind of slower,
but when I check what windows says on screen settings, it's still 144Hz, and the same goes to nvidia control panel. Also when I play a different game, it says that it is 144 fps but it isn't, you can tell when something is running so much less than 144Hz when
you get used to it, and I confirmed that when I setted the vertical sync on in that game and yes, it went down to 60 fps, so the monitor frame rate is set to 60Hz for no reason and neither windows
or nvidia control panel shows that (those ones still say that the monitor is at 144Hz) . I think windows may be changing internally the refresh rate of the screen but I don't know what to do. Also,
this get solved usually by restarting the laptop (and I recently found out that turning G-sync on and then off again gets the problem solved too) but the problem always come back, the screen always gets locked to 60Hz after some time (sometimes it happens
after 15 minutes, other times it happens after 2 hours) and it's really frustrating to be playing and then your monitor just get stuck at 60Hz for no reason. Model: Predator Helios 500, i7-8750h, GTX1070, 144Hz, windows 10 version 1909.

 

Line on the bottom of my screen when switching from 144hz to 60hz

I'm getting a horizontal line on the bottom of my screen when switching from 144hz to 60hz. The line is very annoying and shows up in games and when browsing the internet. Is there anyway to fix this? It doesn't show up on 144hz refresh rate.

Heres how it looks.

imgur.com

 

144hz and 60hz Stuttering Issues

I can pretty much guarantee that the issue is the difference in frequency between the 2 panels, it can either do one frame rate or the other, not both, the stutters are one screen running at 60Hz, thus locking the desktop and any full screen applications to 60fps too, which means that your laptop's panel is running at 60fps while being capable of running at 144Hz, which causes eye burning stutters.